Though there actually isn't a scan yet, info has surfaced that more cameo outfits will be available for Tales of Vesperia PS3.
*NEW! - A new scan from Famitsu features another costume for Karol. This time, Karol as Sergeant Keroro/Sgt. Frog.
Aside from Karol having Lloyd Irving and Judith having Rutee Kartret's costume, info says that Estelle will be having a Chloe Valens (Tales of Legendia) costume, while Raven will be having a Ricardo Soldato (Tales of Innocence) costume. No scans have surfaced yet, but it did come from a reliable source, so...
»»» Karol (Lloyd costume) "?????" (akai nitouryuu, literally "Red Dual Swords School")
»»» Estelle (Chloe costume) "??????" (fukushuu no kiyoshi kishi, "Vengeful Holy Knight")
»»» Raven (Ricardo costume) "????????" (sugoude no hittoman, "Go-getter Hitman")
Lastly, the Tales of VS. Official Complete Guide will be out sometime this September. The guide will include full analysis of stats, available skills, best strategies and possible combos for the 35 playable characters, as well as their complete and detailed walkthrough for Yggdrasill Story Mode, all having complementary screenshots. It also includes interviews with the staff and a guide on Tales of Wall Breaker. It will also come with a password for access to a Special Battle.